CN110409382B - A kind of spiral rolling construction method of earth-rock dam dam face - Google Patents

Abstract

The invention discloses a spiral rolling construction method for the dam surface of an earth-rock dam. First, the size of the silo surface is determined according to the rolling net width B, and the rolling machine rolls the outermost edge of the trajectory line of the designed silo surface clockwise in the forward direction. Press, and then gradually roll the remaining part of the silo surface inward in a spiral way, and record this process as forward rolling; Roll in the reverse direction until it returns to the starting point of rolling in step 1, and record the process as reverse rolling; then repeat steps 1 and 2 to roll the silo surface until the silo surface meets the rolling requirements. The spiral rolling construction method of the invention can realize automatic control of the running track, and the size of the silo surface can be adjusted according to the construction conditions, and has good applicability;

Description

A kind of spiral rolling construction method of earth-rock dam dam face

technical field

The invention belongs to the field of dam body compaction construction of water conservancy and hydropower engineering, relates to a dam surface rolling compaction construction method, and in particular relates to a dam surface spiral rolling compaction construction method of an earth-rock dam.

Background technique

Earth-rock dams include various types of rolling earth dams, rockfill dams and mixed earth-rock dams, and are a type of dam that utilizes local materials. When filling the dam body, in order to reduce the voids of the filling material and improve the integrity of the dam body and the stability of the structure, the dam body needs to be compacted. Dam compaction is one of the important processes of filling, and its rolling method should have the characteristics of high operability, easy quality control, and avoiding leakage or over-rolling. At present, there are a variety of rolling and walking methods, such as the advance and retreat staggered distance method and the circle-turning-sleeve pressing method. Due to the unreasonable design or cumbersome operation of these rolling machines, leakage and over-rolling are prone to occur, which affects the filling quality of the dam body and brings potential safety hazards.

SUMMARY OF THE INVENTION

In view of the limitations of the above-mentioned rolling methods, the present invention aims to provide a method for rolling construction of earth-rock dam dam surfaces, which can satisfy the construction purpose of good rolling quality, reduce leakage or over rolling, and ensure the compaction effect of the dam body.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is:

An earth-rockfill dam surface spiral rolling construction method and algorithm, characterized in that it comprises the following steps:

Step 1: Determine the size of the silo surface according to the rolling net width B. The rolling machine rolls the outermost edge of the track line of the designed silo surface clockwise in the forward direction, and then gradually moves the remaining part of the silo surface inward in a spiral manner. Rolling method, record the process as positive rolling;

Step 2: After completing Step 1, roll outwards in a counterclockwise direction along the spiral path of the rolling track line at the center of the warehouse surface in a backward direction until it returns to the starting point of rolling in Step 1, and record the process as reverse. to crush;

Step 3: Repeat steps 1 and 2 to roll the silo surface until the silo surface meets the rolling requirements.

Preferably, in the steps 1 and 2, at the turning point of the spiral traveling mode, the turning radius should be an integer multiple of the clear rolling width B, and the adjacent turning trajectories should be concentric arcs.

Preferably, in the steps 1 and 2, for each outer layer of the trajectory line, the turning radius is doubled the rolling net width, and the distance between the trajectory lines is always the rolling net width B to ensure no Missing, but grinding.

Preferably, in step 1, the specific method for determining the size of the bin surface according to the rolling net width B is as follows:

According to the rolling net width B, the bin surface is determined to be a quadrilateral bin surface with a length of L+2nB and a width of (2n+1)B. The adjacent turning radii differ by a rolling net width B, and the outermost turning radius is recorded as R _n , the second The outer turning radius is R _n-1 , the formula is as follows:

R _n =nB,(n=1,2,3,...)

R _n-1 =(n-1)B,(n=1,2,3,...)

In the above formula, n is a non-zero natural number.

Preferably, in the rolling process of step 1 and step 2, the time precision is less than 0.0003 seconds.

The advantages and beneficial effects of the present invention are:

1. The present invention analyzes the rolling compaction construction method of the earth-rock dam, and provides a spiral rolling compaction construction method, so as to avoid quality defects such as leakage rolling or over rolling in the dam surface construction rolling compaction;

2. The spiral rolling construction method of the present invention can realize automatic control of the running track, and the size of the silo surface can be adjusted according to the construction conditions, which has good applicability;

3. The present invention is easy to operate, and is easy to realize mechanized and automatic track-controlled flow operations.

Description of drawings

1 is a forward rolling operation diagram of a construction machine according to an embodiment of the present invention;

Fig. 2 is the reverse rolling operation diagram of the construction machine according to the embodiment of the present invention;

Fig. 3 is the route diagram of the rolling center of the embodiment of the present invention;

Fig. 4 is the path algorithm diagram at the rolling center of the embodiment of the present invention;

Fig. 5 is a flow chart of the spiral rolling construction method of the earth-rockfill dam surface according to the embodiment of the present invention.

Detailed ways

In order to facilitate the understanding and implementation of the present invention by those of ordinary skill in the art, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention, but not to limit it. this invention.

Please refer to Fig. 1 to Fig. 5, a spiral rolling construction method for an earth-rockfill dam surface provided in this embodiment includes the following steps:

Step 1: In this example, according to the rolling net width B, the warehouse surface is determined to be a quadrilateral warehouse surface with a length of L+2nB and a width of (2n+1)B, where L is an arbitrary length, which can be adjusted according to the actual situation. As shown in Figure 1, the solid line is the track line during rolling, and the dotted line is the path line at the center of the rolling. The rolling machine rolls the outermost edge of the trajectory line of the designed warehouse surface in a clockwise direction in the forward direction, and gradually rolls the remaining part of the warehouse surface in a spiral way. The radius gradually decreases, and the trajectory lines of the two adjacent layers are concentric arcs, and the turning radius differs by a rolling net width B. Denote the outermost turning radius as R _n , and the second outer turning radius as R _n-1 , where:

R _n =nB,(n=1,2,3,...)

R _n-1 =(n-1)B,(n=1,2,3,...)

As an option, in order to improve the construction accuracy and prepare for automated assembly operations, as shown in Figures 3 and 4, an algorithm model of the rolling path line at the rolling center is established. Assume that the length of the warehouse surface is L+2nB meters, the width is (2n+1)B meters, the traveling speed of the rolling machine is maintained at v m/s, the number of times of rolling the warehouse surface is N times, and the time accuracy is 0.0001 seconds.

Step 2: As shown in Figure 2, after Step 1 is completed, follow the spiral path of the rolling track line at the center of the warehouse surface to roll outward in a counterclockwise direction in a backward direction. The rolling path is the same as Step 1, but the Press in the opposite direction. Until it returns to the starting point of rolling in step 1, record the number of times of rolling on the warehouse surface;

Step 3: Check the number of times of rolling on the surface of the warehouse. If the number of times of rolling on the warehouse surface does not meet the requirements of the specification, repeat steps 1 and 2 to roll the surface of the warehouse until the surface of the warehouse meets the rolling requirements.

It should be understood that the parts not described in detail in this specification belong to the prior art.

It should be understood that the above description of the preferred embodiments is relatively detailed, and therefore should not be considered as a limitation on the protection scope of the patent of the present invention. In the case of the protection scope, substitutions or deformations can also be made, which all fall within the protection scope of the present invention, and the claimed protection scope of the present invention shall be subject to the appended claims.

Claims (3)

1. The spiral rolling construction method for the dam face of the earth and rockfill dam is characterized by comprising the following steps:

step 1, determining the size of a bin surface according to the net rolling width B, rolling in a forward direction in a clockwise direction by a rolling machine on the outmost side line of a track line of a designed bin surface, and then gradually rolling the rest of the bin surface inwards in a spiral advancing manner, wherein the process is recorded as forward rolling;

step 2, after the step 1 is completed, rolling outwards and anticlockwise along the spiral path of the rolling trajectory line at the center of the bin surface in a reverse direction until the rolling starting point in the step 1 is returned, and recording the process as reverse rolling;

step 3, repeating the step 1 and the step 2 to roll the bin surface until the bin surface meets the rolling requirement;

in the step 1, the specific method for determining the size of the bin surface according to the rolled width B is as follows:

determining the bin surface to be a quadrilateral bin surface with the length of L +2nB and the width of (2n +1) B according to the net rolling width B, wherein L is the length of a rolling track line at the center of the bin surface, adjacent turning radii are different by one net rolling width B, and the turning radius of the outermost layer is recorded as R_nThe turn radius of the secondary outer layer is R_n-1The formula is as follows:

R_n＝nB,n＝1,2,3,...

R_n-1＝(n-1)B,n＝1,2,3,...

in the above formula, n is a non-zero natural number.

2. The spiral rolling construction method for the dam face of the earth and rockfill dam as claimed in claim 1, wherein: in the step 1 and the step 2, at the turning position in the spiral advancing mode, the turning radius is integral multiple of the rolling net width B, and the adjacent turning track lines are concentric arcs.

3. The spiral rolling construction method for the dam face of the earth and rockfill dam as claimed in claim 2, wherein: in the rolling process of the step 1 and the step 2, the time precision is less than 0.0003 second.

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